The tracker is now the single entrypoint for inference. Clients POST to
the tracker's /v1/chat/completions and it forwards to a live tracker-mode
(first-shard) node for the requested model, applying round-robin load
balancing across multiple first-shard nodes when available.
Streaming (text/event-stream) is relayed chunk-by-chunk. Non-streaming
responses are buffered and forwarded. BrokenPipeError on client disconnect
is silenced. Upstream errors relay the original HTTP status and body.
Also adds GET /v1/health → {"status": "ok"} on the tracker.
Usage:
curl -s http://tracker:8081/v1/chat/completions \
-H "Content-Type: application/json" \
-d '{"model":"Qwen/Qwen2.5-0.5B-Instruct","messages":[...]}'
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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